Improvement in steam-pressure regulators



FFIGE.

GEORG-E II. OORLISS, OF PROVIDENCE, ItIIODE ISLAND',A

IMPROVEMENT IN STEAM-PRESSURE REGULATORS.

Specification forming part of Letters Patent No. 85,566, dated January5, 1869.

To all lwhom 'it may concern:

Be it known that I, GEORGE II. CORLIss, of the city and county ofProvidence, and State of Rhode Island, have invented a new and ImprovedPressure-Regulator, andI do hereby declare that the ibllowing is a full,clear, and exact description ot' the same, reference being had to theannexed drawing, making a part of this specitication, in which myinvention is represented by a longitudinal section through the center ofthe device.

This invention is for the purpose of effeetin g an automatic reductionof the pressure ot'steam, when it is to be used for heating, or where ahigher pressure is raised in the boiler than is required for thepurposes to which it is to be applied, and making such reduced pressureuniform. rIhis is accomplished by causing the steam to pass through avessel having flexible sides, which, as the vessel fills with steam, arepressed outward in exact proportion to the direct pressure of the steamin chamberB acting upon the valve m, and the pressure of the reducedsteam acting upon the sides of the vessel A, which, in expanding, close,or partially close, a check-valve, thus diminishing the tlow of steamjust in proportion to the combined pressure in chamber `I3 and vessel A,thus gix-'ing, by the combined action of the hi gh-pressure steam uponthe area of the valve mand the reduced lsteam upon the walls ot' thevessel A, a nearly uniform pressure of reduced steam under varyingpressures in the boiler or chamber B.

In the drawings, A represents a met-allie vessel, having flexible sidesc e', capable oi' being sprung outward when subjected to pressure fromwithin. B is an external chamber, formed on the side y of the vessel A,and pro vided with a cap, C'.

'Ihe steam passes from the inductiolbpipe C into the chamber B, thencethrough a port, I, into the vessel A, whence it escapes through theeduction-pipe D.

The port I is opened and closed by a diskvalve, m, attached to the sideof the vessel a', while the seat is attached to the opposite side, a.

The stem of the valve m thus extends from the side a through the vesseland port I; and when the port is closed by the expansion of the vesselA, the valve and its stem subserve the purpose of a tie or stay, andform a rigid and firm connection between the sides of said vessel, thuslimiting their outward movement, and preventing any liability of damageto the vessel by an accidental increase of pressure.

'Ihe apparatus thus forms au automatic steam-regulator, controlling theiiow ot steam through the eduction-pipe, and rendering the reducedpressure uniform.

To facilitate the adjustment of the valve to any required pressure, itis, as shown in the drawing, screwed upon its stem, and may be heldtirmlyin any position by a cheek or jam nut.

I do not, however, limit myself to any particular method of adj ust-ingthe position ot' the valve, but may use any available means that willanswer the purpose.

It is evident at a glance that while this apparatus is perfectlyself-regulating, its simplicity of construction is such as to render itinexpensive and durable to a degree not `attained in any otherdevicehithcrto constructed for the same purpose.

Having thus described my invention, what I claim as* new, and desire tosecure by Letters Patent, is

1. A vessel with lexible sides, when the same is constructed andarranged substantially as herein shown and described.

2. 'Ihc combination and arrangement et vessel A, valve-stem a, and valvem, whereby to limit the outward movement of the flexible sides of thevessel A, substantially as described.

3. rIhe construction and arrangement of the vessel A and valve m,whereby the combined pressure in chamber B and vessel A shall opcrate toclose the valve, substantiallyas set fort-h.

GEO. II. CORLISS. IVitncsses:

HENRY MARTIN, JonN (l. IURKIs.

